Noise refers to sound that is not being sought after. Sound experienced by one can be art in another's ears. The way people experience the noise depends, for example, on the intensity of the sound, its frequency and duration.


Aim of Regulation No. The aim of noise regulation is to prevent or reduce the harmful effects caused by noise. The regulation covers, for example, noise in concerts and entertainment venues, car and aircraft traffic, as well as noise related to operations.

The limits for noise from several sources are listed in Tables I to V of the Noise Regulations.

112/2012, as in the Noise Ordinance, specifically provides that acoustic accommodation is good in children's environments, such as kindergartens, primary schools, recreational homes and other places where children stay. It requires that premises must meet, at a minimum, the acoustic class C of the standard ISST 45 - Acoustic Classification of Residential and Commercial Buildings.

The Labour Inspectorate

The Labour Inspectorate supervises noise at workplaces.


Noise level

The unit of measure of sound power level is decibels (dB). Decibel - the scale is a logarithmic scale like the earthquake measurement unit Richter. A doubling is an increase of 3 dB, a quadrupling of 6 dB, etc.

In other words, a person who is constantly staying at 94 dB noise for one hour has experienced the same noise as a person who is constantly staying for eight hours at 85 dB noise. There is talk of a 10 dB increase perceived as a doubling of the noise.

The acoustic indicators

In order to explain slightly which noise references signal the equivalent sound level comprises a measurement with a constant sound intensity and dictates the sum of the sound energies of the fluctuating sound level over a certain period of time. In other words, the meter logs the sound level down smoothly over a given period of time, which continuously fluctuates and ultimately provides a single value, the equivalent sound level. It can be regarded as some kind of average sound energy to which a person is subjected over a certain period. There is no standard mean since the dB values are logarithmic. The maximum sound level is then again a maximum sound range above 0.125 sec and finally the highest sound peak is a measurement over an even shorter period of time. The highest sound peak is measured with a so-called C-filter and the lowest equivalent and maximum sound level with an A-filter. A-filter follows the frequency range perceived by humans at lower sound levels. The C-filter then again mimics how humans perceive very high sound levels and amounts to better tones in the lowest frequency range.

Inquiries and/or Tips

Department of Health

Please contact the National Institutes of Health, have a tip or inquiry with the National Institutes of Health, or call Customer Service.